User's Manual

Choosing a CTC value
Typically you would set the CTC value to be 5 to 10 times longer than the maximum
expected presence time of real targets. Settings the CTC to too short a value may result in
real targets fading into the background thus resulting in poor detection.
Typical CTC values are 1 to 5 minutes for highway mode if vehicles are not expected to
stop in front of the radar for extended periods of time.
Typical CTC values are 10 to 30 minutes for intersection mode where vehicles may be
expected to stop in front of the radar for a few minutes at a time.
As of firmware version 127, CTC values greater than 28 minutes are not honored and are
internally limited in the radar to 28 minutes. Future versions of the radar firmware are
expected to support CTC values of up to 6 hours to allow for incident detection where
traffic may be stopped for multiple hours at a time.
You MUST issue the “Initialize Clutter” command via the provided GUI after you
have setup the radar in the intended location.
You MUST reissue this command if you change the operating mode of the radar, as
the clutter map will be considerably different.
You MUST reissue this command after you adjust the radar pointing, height or angle
on the road.
Do NOT issue “Initialize Clutter” command on a periodic basis (e.g. every hour).
First, this is not necessary. Second, the clutter map is saved to FLASH memory that
will wear out after 10000 writes.